This space is called the Silfra fissure in Thingvellir Lake, Iceland, and it’s located where North America meets Europe, between the North American and Eurasian continents.

According to the video makers, the two land masses are drifting apart 2 centimeters a year, leaving this canyon riddled with valleys, volcanos, and faults in between—where the water is extremely clear due to filtration through underground lava.

Due to its clear waters, Silfra is a popular dive site, and others have recorded their experiences: